Gantry crane hanging on steel billet lifting beam, connecting rod, opening and closing mechanism:

1 lifting beam
Lifting beam is connected with the day coupler components, coupled with snap rings unloading, lifting sling-style ear coupling joints and three structures. Unload button rings hanging shaft coupling, so that the force spreader improvement, but also to avoid the phenomenon of decoupling when handling billet, reducing the height of the fixture itself is conducive to low places. Sling hanging shaft type connection, so that the clamp force is better, but the height of the spreader's own large, need to tall places, in hanging hook manually when required auxiliary hooks. Lifting lug-type coupling shaft,  sino hoist  drivers may be directly linked, but in lifting operations required to make the ground spreader, and decentralization of the hook until unstressed far, so easily lead to  steel crane  hook decoupling.
2 link
Rod is hanging beams and clamp arm joints.
3 opening and closing mechanism
Opening and closing mechanism with manual lift rod, (Automatic) hook type, (auto) single hook, (auto) turn-lock and other forms. Automatic opening and closing mechanism is to achieve automatic opening and closing of the billet clamp mechanism. Its action does not require any external power source,bridge gantry crane relying on its own gravity to achieve jig fixture open and close automatically. Lubricated from the closed institutions: must be regularly (2-3 days) add oil (or oil), and then moves up and down several times until completely smooth. Plus excess grease lubrication is strictly prohibited!